Friction-clamp for fire-escapes



(No Model.)

J. T. JONES.

FRIGTION CLAMP BOB, FIRE-ESGAPES.

Patented Sept.

N. PETERS PhmoLilhognpMr. wmin lon. D4 6,

son descending the flreescape.

faces around which it is coiled; and, secondly, frond more or lesspressure by the hands in w as. Fig. 5 is a cross-section at y 3 showingpended.

as shown, adapted to slide onthe rope O, 'which passes inside of saidtube all through and preferably'of one piece, serves to produce,nessgwith which they clasp said handle-secthat lap past each other arecut away on the out of said tube, are then securely attached to UNITEDSTATES PATENT OFFIC J'PTHOMAS JONES, or UTIOA,NEW YORK FRICTION-CLAMPFOR FlRE-ESCAPES.

SPECIFICATION forming part of Letters Patent No. 284,305, datedSeptember 4, 1883,

Application filed March 12, 1883. (No model.)

To all whom it may concern Be it known that 1, JOHN THOMAS J ONES, ofthe city of Utica, in the county of Oneida and State of New York, haveinvented certain new. and usefulgImprovernents in Friction Clamps forFire-Escapes and other Devices, of whichthe following is a correctdescription.

In fire-escapes the rope has been coiled around a friction rod orbarrel, and pressure has'been applied to regulate the speed of dea loopthrough the handle, so that the friction results primarily from theweight drawing the rope powerfully into contact with the surgrasping thehandle. a i

.In the drawings, Figure 1 is a side View of i said clamp attached to arope; Fig. 2, a front view of the same; Fig. 3, a rear view of the same.Fig. 4c is a cross-section of the same at the spring, and Fig. 6 isaview of the link for the strap by means of which the person is sus- Ais a metal tube, bent in the form of a coil,

said coil. The tube being made coil shaped,

friction upon the rope, andto a greater or less degree to support theweight of the per- B is a cla1np-handle, constructed in two sections,which are held toward each other by the springs F F. These springs canbe inside, so as to produce more or less friction upon the rope 0,according to their size and the tighttions together; or they canbemadewith springloops with set-screws to adjustthe amount of friction orpressure placed on said rope 0. Sections of the tube Aon the straightparts outsideabout the. length of the split cla1nphandle B, and the tubeis then riveted orfastened together. The sections G, that are cut theinside ofthe clamp-handleB, so that when said clamp-handle is grasped inthe hands of the operatoras the two sections are pressed togetherfriction is produced on the doubled rope, that is between said clamp andthe tube A, four distinct friction-surfaces being created thereby. Bymaking the section G of rubber or other similar material friction isapplied to the rope with less pressure upon the I clamp-handle thanthough metal is used.

Dis a link with double eyes, the upper eye surrounding the tube A, sothat a rope or belt, E, can be passed through the lower eye of the linkand attached to the operator.

A section of the tube A may be cut away, so that the shoe K,which isattached to saidlink D,. presses against the rope O, and, producingfriction on said rope, acts asa brake by the weight of the personsuspended by the rope or belt E.

y I claim as my invention-- 1. Thetubular shield for the rope, bent intothe form of a loop, with two straight parallel portions where the partsof the rope lie side by side, in combination with the two-part clamp B,constructed and operating substantially as set forth.

2. The tubular shield for the rope, bent into the form of a loop, andparallel where the two portions of the loop lie side by. side, incombination with the two-part clamping-handle B, and the tube-sectionsG, secured within the handle B, substantially as specified.

3. The tubular shield, formed as a loop, through which the rope passes,in combina tion with the link D and friction-shoe K, connected to suchlink and the suspendingstrap or waist-belt, substantially as set forth.

4. Incombination with the tubular shield and rope, the tube-section G,of india-rubber or similar material, substantially as specified.

Signed by me this 7th day of March, A. D. 1883.

J. THOS. JONES.

Witnesses: a

MoRTIMERG. THOMSON, JNo. A. ROBERTS.

